What branch of government can the senate limit the power of?

In the United States, the Senate is one of the two houses that make up the Legislative Branch, aka Congress. According to the system of Checks and Balances, the Legislative Branch can limit the power of the Executive Branch through two methods: it can override a President's veto with 2/3 majority vote (meaning the bill will become law anyway without President's signature), or it can remove an unsatisfactory Executive Offical from office, because it has the power of impeachment, and it also tries impeachment cases. The Legislative Branch also has some power over the Judicial Branch because it confirms judicial appointments.